Dual mono - do I need 2 soft start modules?

[sthcoaster]

Building a dual mono USSA amp. Should I use one soft start per side (Sjostrom) or is one sufficient?
Thanks.

 

[mdpaudio]

If you have two separate power transformers then yes you need two soft start units.

 

[TonyTecson]

yes...

 

[sthcoaster]

Thanks. Good thing I have a second one standing by!!

 

[Mark Johnson]

Think of a soft start circuit as a fancy power on/off switch.

If you're building a dual mono amp do you NEED two on/off switches?

 

[NanoFarad]

One soft starter is good enough. You can try the simple circuit published in Elektor magazine.

 

[kapitiaudio]

If dual mono means you can get away with smaller transformers and less capacitance in the PSU, then perhaps you don't need a soft start circuit at all?

 

[SRMcGee]

For what little it's worth, I built a dual monaural F6 a couple of years ago that uses just one soft start board (one of Mark's H9KPXG boards, albeit with a MS32 20008). Zen Mod cautioned me to add a fuse to each channel after the soft start board and before the transformers, which I have yet to install. That said, I've used the amp intermittently (periodically swapping it in for my F5T V3s) and have never had an issue with it. Sounds damn good.

Regards.

 

[jhstewart9]

SRMcGee Avatar looks same as my avater??

 

[SRMcGee]

jhstewart9:

Yup.

Regards.